8421434 has 12 divisors (see below), whose sum is σ = 14694714. Its totient is φ = 3609144.

The previous prime is 8421419. The next prime is 8421463. The reversal of 8421434 is 4341248.

It can be written as a sum of positive squares in only one way, i.e., 6744409 + 1677025 = 2597^2 + 1295^2 .

It is a d-powerful number, because it can be written as 8⁵ + 4² + 2²³ + 1 + 4² + 3² + 4² .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42869 + ... + 43064.

Almost surely, 2^8421434 is an apocalyptic number.

8421434 is a deficient number, since it is larger than the sum of its proper divisors (6273280).

8421434 is a wasteful number, since it uses less digits than its factorization.

8421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85949 (or 85942 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 8421434 is about 2901.9707097075. The cubic root of 8421434 is about 203.4520248234.

It can be divided in two parts, 84214 and 34, that added together give a palindrome (84248).

The spelling of 8421434 in words is "eight million, four hundred twenty-one thousand, four hundred thirty-four".